In an attempt to develop a more suitable assay for an unidentified factor found in fish solubles and liver products (Sunde et al. 1950) a modification of the ration of Carlson et al. (1949) was formulated. The basal ration consisted of the following in percent: sucrose 66, soybean oil 5, salts V (Phillips and Hart, 1935) 6, alpha protein* 22, vitamin A and D feeding oil (3000A-400D) 0.5, glycine ... [Show full abstract] 0.3, DL methionine 0.3, L cystine 0.3, choline chloride 0.2, and B12 concentrate #3 (Merck) 0.2. The following vitamins were added as follows in mg. per kg.: thiamine HC1 6, riboflavin 12, niacin 100, Ca pantothenate 40, pyridoxine HC1 8, biotin 0.4, menadione 0.5, i-inositol 2000, alpha tocopherol 3, folic acid 4, and para-amino benzoic acid 100. All additions to the basal were made at the expense of sucrose. The dextrin is autoclaved corn starch.
Straight run chicks (New Hampshire × . . .